Just had a quick look at their terms n conditions.
look pretty iron clad.
Terms & Conditions
BOOKING IMPLIES THAT YOU HAVE READ, UNDERSTOOD AND AGREE TO BE BOUND BY THE TERMS AND CONDITIONS OF CARRIAGE AND AGREE TO COMPLY WITH ALL APPLICABLE LAWS, RULES AND REGULATIONS. FOR THE AVOIDANCE OF DOUBT, NO EMPLOYEE, REPRESENTATIVE OR AGENT HAS THE AUTHORITY TO ALTER, MODIFY OR WAIVE ANY OF THESE CONDITIONS. NO CORRESPONDENCE WILL BE ENTERED INTO PERTAINING TO THE TERMS AND CONDITIONS OF CARRIAGE.
Also
Changes to Flight Schedules
We reserve the right to amend, introduce stops, cancel or consolidate flights as necessary to achieve the high load factors required to maintain profitability whilst offering low fares. Whilst we will try to avoid making changes, we will of course notify you of any material change where it is practical to do so.
Loooks like you need to pay or else.